| Unilateral | Bilateral | |||
|---|---|---|---|---|
| Preoperative | Postoperative | Preoperative | Postoperative | |
| No. cases | 43 | 43 | 17 | 17 |
| FEV1 (percent predicted) | 31 ± 10 | 39 ± 13 | 27 ± 8 | 38 ± 10 |
| TLC (L) | 8 ± 1.6 | 7.3 ± 1.6 | 7.2 ± 1.2 | 6 ± 1.6 |
| RV (L) | 5 ± 1.1 | 4.1 ± 1 | 4.8 ± 0.9 | 3.3 ± 0.9 |
| PO2 (mm) | 66 ± 10 | 66 ± 11 | 62 ± 12 | 69 ± 12 |
| Transitional dyspnea index | "Improved" | "Improved" |
Abbreviations: FEV1 = forced expiratory volume in 1 second; PO2 = partial pressure of oxygen; RV = residual volume; TLC = total lung capacity.
From: Lung-Volume Reduction Surgery for End-Stage Chronic Obstructive Pulmonary Disease
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